ZIP files of ready-to-in­stall CTAN pack­ages. The pack­age con­tained in CTAN di­rec­tory a/b/c/d/ ap­pears as in­stall/a/b/c/d.tds.zip – each such file may be un­zipped di­rectly into a TDS tree, and should con­tain no `tree pre­fix'